Journal
ELECTROCHIMICA ACTA
Volume 220, Issue -, Pages 205-210Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2016.10.049
Keywords
non-toxic; lead-free; tin; perovskite; semiconductor; photoelectrochemistry; liquid junction; solar cell; scanning electrochemical microscopy
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Funding
- U.S. Department of Energy SISGR [DE-FG02-09ER16119]
- Robert A. Welch Foundation [F-0021]
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Lead-free organic-inorganic tin halide perovskites were prepared and investigated by a rapid screening technique utilizing a modified scanning electrochemical microscope (SECM). We studied liquid junction photoelectrochemical (PEC) solar cells based on p-type methylammonium tin halide (MASnI(3-x),Br-x) perovskites employing the benzoquinone (BQ) redox couple, BQ/BQ(center dot-), in dichloromethane (CH2Cl2). We found that the optimized Sn-based mixed halide perovskite, MASnI(0.5)Br(2.5), exhibits enhanced performance and stability in liquid junction PEC solar cells, with a power conversion efficiency of 1.51% (an increase of 20.8%) and a photovoltaic lifetime of 175 min (an increase of 75.0%), in comparison to MASnI(3) perovskites. (C) 2016 Elsevier Ltd. All rights reserved.
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